The scratch test.
The scratch test is used by scientists and people who study rocks and minerals to determine the strength of the rock. They have the scratchers numbered one through ten and scratch the rock or mineral until the scratcher makes a mark in the mineral then they know the strength of the rock.
hello,
endangered species are animal/species that are very likely to be extinct/gone.
another meaning: are in danger to be seriously in risk of being gone.
Answer:
a chlorophyll
Explanation:
chlorophyll is the pigment in chloroplast that gives it its green color
